Microsoft has released a test version of Windows 10 S to allow you to test Windows 10 S on a variety of individual Windows 10 devices. You need a genuine, activated license of Windows 10 Pro, Education or Enterprise for the installation.

The Windows 10 S self-installer will allow you to test Windows 10 S on a variety of individual Windows 10 devices (except Windows 10 Home) with a genuine, activated license. Please test Windows 10 S on a variety of devices in your school and share your feedback with us.

Windows 10 S is built to give schools the familiar, robust, and productive experiences you count on from Windows in an experience that's been streamlined for security and performance in the classroom, and built to work with Microsoft Education

Windows 10 S is different from other editions of Windows 10 as everything that runs on the device is verfied by Microsoft for security and performance. Therefore, Windows 10 S works exclusively with apps from the Windows Store. Some accessories and apps compatible with Windows 10 may not work and performance may vary. Certain default settings, features, and apps cannot be changed. When you install Windows 10 S, your existing applications and settings will be deleted and you will only be able to install apps from the Windows Store.
Configuring Windows 10 S for school use is easy: Education customers must configure SetEduPolicies for use in K-12 schools. For more information on how to do these, see Use the Set up School PCs app and Windows 10 configuration recommendations for education customers.

Installing Office 365 for Windows 10 S (Education preview): To install the Office applications in a school environment, you must use the free Set up School PCs app, which is available on the Microsoft Store for Education and from the Windows Store.
As we finalize development of Office 365 for Windows 10 S (Education preview), the applications will be updated automatically. You must have an Office license to activate the applications once they are installed.To learn more about Office 365 for Education plans, see FAQ: Office on Windows 10 S.

Supported devices
The Windows 10 S install will install and activate on the following editions of Windows 10 in use by schools:
Windows 10 Pro
Windows 10 Pro Education
Windows 10 Education
Windows 10 Enterprise
Other Windows 10 editions cannot be activated and are not supported. If your device is not running one of these supported Windows 10 editions, do not proceed with using the Windows 10 S installer. Windows 10 N editions and running in virtual machines are not supported by the Windows 10 S installer.

  Test Windows 10 S on existing Windows 10 education devices